Vintage Gruen Precision Swiss made men's art deco watch dating from approximately 1942.  The Curved case is 10K gold filled (front and back) with tarnish and is model 430-498.  I have not attempted to polish it but the color looks rose gold.  The 17 jewel Swiss made manual wind movement is caliber 440.  With a little shaking the watch will run but is erratic.  It might run for a day or it might run for a few seconds. It has not been timed for accuracy  When setting it sometimes does not want to go back into winding mode.  A service will be needed.  For parts or repair.